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Device with convertible two-stage supercharging and single-stage parallel connection of carbon dioxide refrigerant

A carbon dioxide, two-stage supercharging technology, applied in the direction of compressors, refrigerators, compressors, etc., can solve the problems of increasing energy consumption, the usability and economic impact of air source heat pumps, and reducing heating capacity, and achieves a wide range of applications. Effect

Pending Publication Date: 2019-11-19
PANASONIC APPLIANCES COLD CHAIN (DALIAN) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the north of my country, especially in the northeast region, due to the low ambient temperature in winter, it is difficult to effectively use the air source heat pump. The usability and economy of air source heat pumps are seriously affected

Method used

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  • Device with convertible two-stage supercharging and single-stage parallel connection of carbon dioxide refrigerant

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Embodiment Construction

[0010] Such as figure 1 As shown, the system can automatically switch the control valves (8), (9), and (10) according to the evaporation pressure and evaporation temperature in the evaporator (5), so that the heat pump system can be switched between two-stage and single-stage , so that the energy efficiency and cooling and heating capacity of the system can be optimized. Install a temperature controller near the evaporator. When the temperature sensed by the controller is lower than the set temperature, the suction stop valve (8) is closed, the exhaust stop valve (10) is closed, and the suction and exhaust short-circuit valve (9) is opened. , compressor (2) is connected in series with compressor (1), CO 2 The heat pump cycle system is a two-stage compression system, and the CO in the gas-liquid separator 2 The refrigerant is inhaled by the compressor (2), exhausted by the compressor (2) and enters the discharge short-circuit valve (9), and is compressed again by the compress...

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Abstract

The invention discloses a device with convertible two-stage supercharging and single-stage parallel connection of a carbon dioxide refrigerant, and belongs to the technical field of heat pumps. The device with convertible two-stage supercharging and single-stage parallel connection of the carbon dioxide refrigerant comprises a carbon dioxide compressor, carbon dioxide gas cooling, a throttling device (an electronic expansion valve), an air-cooled evaporator, a gas-liquid separator, a cold water make-up pump, a suction shut-off valve, a suction and exhaust short-circuit valve and an exhaust shut-off valve. Through the opening and closing of the suction shut-off valve, the suction and exhaust short-circuit valve and the exhaust shut-off valve, the carbon dioxide compressor is switched in a two-stage supercharging state or a single-stage parallel connection state; a refrigerant system can be automatically switched in the single-stage state or the two-stage state, the energy efficiency ofthe system is the highest, and the automatic switching of the single-stage state and the two-stage state enables the whole device to be adapt to a wider range of ambient temperature, the device can beapplied to the ambient temperature of -30 DEG C-43 DEG C.

Description

technical field [0001] The invention is used in the technical field of heat pumps, and relates to a single-stage and double-stage CO2-combined air source heat pump system with automatic switching. Background technique [0002] At present, in the north of my country, especially in the northeast region, due to the low ambient temperature in winter, it is difficult to use the air source heat pump effectively. The usability and economy of air source heat pumps are seriously affected. Contents of the invention [0003] Aiming at the existing problems, the purpose of the present invention is to provide a carbon dioxide refrigerant double-stage pressurization and single-stage parallel switchable device. [0004] The technical scheme adopted in the present invention: use the temperature controller near the evaporator to control the opening and closing of the suction stop valve, the suction and exhaust short-circuit valve and the exhaust stop valve; When the sensed temperature is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/00F25B30/06F25B31/00F25B41/04F25B41/20
CPCF25B9/008F25B30/06F25B31/00F25B2309/06F25B2400/075F25B2700/2117F25B41/20
Inventor 代小军王铁郭心李徽于丽沈治涛杨萍
Owner PANASONIC APPLIANCES COLD CHAIN (DALIAN) CO LTD
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